Combination heater and defroster



0a. 10, 1939. H Wu H M 2,175,863

COMBINATION HEATER AND DEFROSTER Filed Sept. 7, 1937 2 Sheets-Sheet l INVENTORS CARL. H. WILL HENRY W. FINH ATTORNEYS Oct. 10, 1939. c. H WILL Er AL COMBINATION HEATER AND DEFROSTER Filed Sept. 7, 1937 2 Sheets-Sheet 2 INvEN-roRs CARL H. WILL. HEN y 57 f 4.49.

W. FINK AT ORNEYS Patented Oct. 10, 1939 UNITED STATES PATENT OFFICE COMBINATION HEATER AND DEFROSTER ware Application September 7, 1937, Serial No. 162,706

4 Claims.

This invention relates to new and useful improvements in combination heaters and defrosters and more particularly to an apparatus of the general character disclosed in their pending application, Serial No. 137,842, filed April 1 1937.

An object of the present invention is to provide a combination heater and defroster including a casing having a main air outlet and an auxiliary air outlet adapted to be connected to a defrosting device, and a combination fan and blower being mounted adjacent one side of the core adapted to draw air through the core and discharge it from said main and auxiliary air outlets.

Other objects of the invention reside in the unique construction of the air circulating means, which comprises a fan and blower adapted for simultaneous operation; in the provision of an eccentrically disposed or spiral shaped air passage, communicating directly with the auxiliary air outlet and a portion of the air circulating ducts of the heater; in the construction of a blower mounted within said eccentrically disposed air passage for drawing air through a portion of the core and discharging it from the heater through the auxiliary air outlet; in the general construction of the annular member secured in position at the discharge side of the core and in which the fan is mounted; and, in the provision of a blower secured directly to said fan and adapted for simultaneous rotation therewith, to draw air through a portion of the core and discharge it from the heater through said auxiliary air opening.

Other objects of the invention will appear from the following description and accompanying drawings and will be pointed out in the annexed claims.

In the accompanying drawings there has been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown as various changes may be made within the scope of the claims which follow.

In the drawings:

Figure 1 is a vertical sectional View on the line l-I of Figure 2, showing the general construction of the heater;

Figure 2 is a sectional View on the line 22 of Figure 1, showing the arrangement of the auxiliary air outlet; and

Figure 3 is a detail sectional view on the line 3-3 of Figure 2.

The novel heater, herein disclosed, comprises a casing 2 composed of front and rear casing sections 2 and 2 the section 2 being provided at its rear with suitable air intake openings 3, and the front section 2 having a main air outlet opening 4 in its front wall, as best illustrated in Figures 1 and 2. An annular frame 5 is shown mounted for rotary adjustment in the opening 4, and has a plurality, of deflectors 6 for controlling air circulation from the heater. A suitable screen I is preferably provided back of the deflectors 5, as best illustrated in Figure A suitable air heating core, generally indicated by the numeral 8, is suitably mounted within the casing 2 and comprises upper and lower tanks 9 and II, respectively, which communicate with the usual water circulating tubes l2 and an inner tank 13. The usual water intake and discharge pipes and I5 are shown connected to the tanks II and 9, respectively, of the core, and have their free ends projecting from the heater whereby they may be suitably connected to the fluid cooling system of the vehicle engine, by suitable conduits, not shown. The core is shown provided with a central opening I 6.

A feature of the present invention resides in the specific construction of the means provided for circulating air through the core and easing. As best shown in Figure 1, an annular member l1, having a cone-shaped portion I8, is mounted in fixed relation to the core 8, and has its inwardly facing edge positioned in close proximity to the core, as illustrated in Figure 1. The annular member I! may be supported in position by suitable rivets l9 secured to lugs 2| provided on a spacing member 22, which is secured to the core by suitable means, not shown.

Suitable housing members 24 and 25 are secured together as shown at 2B, in Figure 1, and

cooperate with a portion of the annular member IT, to provide a spiral shaped or eccentrically disposed air passage 21. The air passage 21 substantially surrounds the cylindrical portion of the member 11, and communicates with the air outlet 28, as best shown in Figure 2. By reference to Figure 1, it'will be noted that an annular gap 30 is provided between the inner edge 20 of the spacing member 22, and the periphery of the member [1, through which air may be drawn through the outer portion of the core and into the air passage 21, which communicates with the auxiliary air outlet 28.

A suitable blower 29 is mounted in the chamber 21 and comprises an annular rim 3|, shown secured to the outer terminals of the blades of a suitable air impeller or fan 32, in such manner that the blower 29 will rotate in the spiral passage 2T, whereupon the fan 32 will rotate within the opening provided by the annular member H, as clearly illustrated in Figures 1 and 2.

The fan 32 and blower 29 are located in front of the core, adjacent to the screen I, and are driven by a suitable motor 33, mounted in the central opening I6 of the core.

Referring now to Figure 1 it is again noted that the outer casing 2 is composed of a front section 2 and rear section 2 The section 2 carries an annulus 2 which is cross-sectionally L-shaped, to provide a part 2 which fits the inner surface of the rear section 2 and a part 2 which engages the outer face of the blower housing or front section 24 thereof, to hold the blower housing and radiator against forward axial movement. The annulus 22 has an outwardly extending flange 22 which with the shroud, or annulus l1, defines the annular gap 30. The section 25 also has an opening defined by an inturned flange 25, which flange is fitted over the flange 22 as shown to center the housing on the ring 22. The element 2 is attached to the forward outer casing section 2 so that this element is removable with that section. The means for securing the part 2 to the rear outer casing section 2 have not been shown, but screws can be used like those shown in co-pending application 162,705 of Fink, for detachably securing 2 to 2 When this detachable securing means is loosened the front section 2 can be removed and with it the annulus 2 thus permitting, forward axial movement of the blower housing.

Section 25 may or may not be rigidly secured to the ring 22. If it is so secured then after bolts 26 have been removed the section 24 can be removed after section 2 and its ring 2 have been removed. If it is not secured then the entire blower housing with its fan can be removed after the fan is disconnected from the motor shaft and after section 2* is removed.

The pipes l4 and i5 traverse and are supported in the back wall of the rear casing section 2 by resilient cushion inserts or gaskets respectively designated l4 and I4 It is noted that each pipe, at a point adjacent the corresponding insert is bent so that its long axis is at right angles to the axis of that part of the pipe which passes through the insert.

By constructing the air circulating means, as herein disclosed, and locating the fan and blower at the front of the core, air is drawn through the core, and not blown therethrough, as in the structure disclosed in pending application, Serial Number 137,842, hereinbefore mentioned. It will also be noted that the fan 32 will circulate air through the main outlet opening 4 of the casing, and the blower 29 will draw air into the spiral air passage 21 and discharge it through the auxiliary outlet 28. The air circulated from the heater through the auxiliary passage 28, is drawn through the outer'portion of the core, whereas the warm air discharged from the heater through the main air outlet 4, is drawn through the intermediate or central portion of the core.

The heater, as illustrated in Figures 1 and 2, is comparatively simple and inexpensive in con struction. Because of the annular air gap 35 provided between the periphery'of the member l1 and the inner edge 2!! of the member 22, warm air is drawn into the spiral air passage 21 by the blower 29, which air is discharged through the air outlet 28. A suitable conduit, not shown, may be connected to the auxiliary discharge 28 for conducting warm air therefrom to a suitable defroster device. The deflectors 6 provide means whereby the circulation of warm air from the heater may readily be controlled.

We claim as our invention:

1. A heater of the class described, comprising a first casing having a first discharge opening, a radiator in the casing having a face opposed to said discharge opening, a second casing within the first casing interposed between the face of the radiator and said first discharge opening, a first annulus attaching the second casing to the radiator, said first annulus and said second casing having means by which one is detachably centered on the other, a second annulus within the first annulus and within the second casing and dividing said second casing into an outer chamber communicating with the radiator through said first annulus, and an inner passage establishing communication between the radiator and said first discharge opening, a second discharge opening leading tangentially from the outer chamber of said second casing and through said outer casing, and fans within the second casing respectively for forcing air out of said first opening and for drawing air into the outer chamber of said second casing, and forcing it through said second opening.

2. A heater of the class described, comprising a first casing having a first discharge opening, a radiator in the casing having a face opposed to said discharge opening, a second casing within the first casing interposed between the face of the radiator and said first discharge opening, a first annulus attaching the second casing to the radiator, said first annulus and said second casing having means by which one is detachably centered on the other, a second annulus within the first annulus and within the second casing and dividing said second casing into an outer chamber communicating with the radiator through said first annulus, and an inner passage establishing communication between the radiator and said first discharge opening, a second discharge opening leading tangentially from the outer chamber of said second casing and through said outer casing, and fans wlthin the second casing respectively for forcing air out of said first opening and for drawing air into the outer chamber of said second casing, and forcing it through said second opening, one fan being mounted upon the other.

3. In a heater of the class described, a first casing having an air discharge opening, a radiator in the casing through which air moves toward said discharge opening, a second casing within the first casing, a shroud in part defining within the second casing, a central passage and a circumscribing chamber, both communicating with the radiator, a fan forcing air through the central chamber, a second fan in the circumscribing chamber, a motor operating the fans, and an annulus connecting one side of the second casing to the radiator, said annulus and said second'casing having means by which one is centered on the other, said means in part defining with the shroud an annular passage through which air enters said circumscribing chamber.

4. In a heater of the class described, a first casing comprising separable front and rear sections, the front section having an air discharge opening, a radiator in the casing through which air moves toward said. discharge opening, a sec- 0nd casing as a fan housing within the first casing, said second casing comprising two separable parts, an annulus connecting one side of the second casing to the radiator, said annulus and said second casing having means by which one is centered on the other, said means in part defining a passage through which air enters said second casing, and means carried by the front section of the first casing for holding said second casing against forward motion in an axial direction.

CARL H. WILL. HENRY W. FINK. 

